Interview with Alan Boss of an analog of Earth Facts
NASA Kepler mission discovered the first planet from the habitable zone, orbiting a star similar to the Sun. A planet called Kepler 22-b.
From an interview with Alan Boss (Carnegie Institute of Science), who heads a team of researchers who discovered Kepler 22-b, it is clear that this planet is the closest analogue of the Earth. The period of rotation around sun-like star is about a year. Kepler 22-b is 2.5 times the size of Earth, has the distance of the orbit at which the planet may be present in water as a liquid. The surface temperature is close to the earth (~ 23 ° C).
Figure 1. The figure shows our solar system and the system of Kepler 22-b, which has a habitable zone temperature at which there may be liquid water necessary for life. Sun planet Kepler 22-b smaller than ours, so the habitable zone already.
The scientist also said that there are more options for early discovery of several super-Earths orbiting dwarf stars of type M with a mass of 2-10 times smaller than the mass of the Sun. Such planets would be much closer to their colder stars to have the right temperature to maintain liquid water. In addition, they have a short period of sidereal, is 30-60 days. Kepler 22-b, on the contrary, makes a complete revolution around its sun for 290 days, which is comparable to that of the Earth (365 days).
Discovered planet is located in the Milky Way. Her sun is removed by 600 light years from Earth. For further investigation of Kepler 22-b should support the work of Kepler Telescope, the timing of which ends in a year. If you extend the mission to the telescope for 3-4 years, you can get invaluable information about the planets similar to the Earth, which even 15 years ago, scientists did not even know existed.